It is a body tissue that has the ability to contract. It shortens and generates force. It relaxes and returns to its original length. Muscles move joints, stabilize the body, move air and food through the organs, act as valves for bladder, bowel and other organs. They control movement of the eyes. They help us express ourselves by changing the shape of our faces (smile, frown, etc).
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4

Need more info:
If it is local swelling and pain, hot compresses amy help. Ibuprofen or another non-steroidal anti inflammatory may help. If there is any redness or pain to touch, you should have your physician look at the site.
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5

See Doctor:
This problem could be a recurring infection or inflammation of a tendon or muscle. A primary care doctor would be the best first place to start to evaluate the symptoms and give you a good idea what to do next.
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9

Absolutely:
Your swelling could be due to the RA, which would also cause pain in the joints. Fibromyalgia can cause diffuse pain anywhere in the body. Make sure you are followed by a rheumatologist who can help get these symptoms under control. I would also suggest extra vitamin D (5000 units of D3 daily). Studies suggest that higher amounts my decrease the frequency and severity of flare-ups.
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Swelling is the enlargement of organs, skin, or other body parts. It is caused by a buildup of fluid in the tissues. The extra fluid can lead to a rapid increase in weight over a short period of time (days to weeks). Swelling can occur all over the body (generalized) or only in one part of the body (localized).
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